LXT6155LE Intel Corporation, LXT6155LE Datasheet
LXT6155LE
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LXT6155LE Summary of contents
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LXT6155 155 Mbps SDH/SONET/ATM Transceiver The LXT6155 is a high speed fully integrated transceiver designed for 155 Mbps SDH/SONET/ ATM transmission system applications. The LXT6155 provides a LVPECL interface for fiber optics modules, and a CMI interface for coax cable ...
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... Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order. Copies of documents which have an ordering number and are referenced in this document, or other Intel literature may be obtained by calling 1-800-548-4725 or by visiting Intel's website at http://www.intel.com. Copyright © Intel Corporation, 2001 *Third-party brands and names are the property of their respective owners. ® ...
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Contents 1.0 Pin Assignments and Signal Descriptions 2.0 Functional Description 2.1 Transmitter .......................................................................................................... 13 2.1.1 Transmitted Signal ................................................................................. 13 2.1.1.1 Fiber Based G.957/GR-253 Transmission Systems ................. 13 2.1.2 Coax Based G.703/GR-253 Transmission Systems .............................. 13 2.1.2.1 CMI Encoding ............................................................................ 14 ...
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... CMI Encoded Zero per G.703 and STS-3 ........................................................... 43 25 CMI Encoded One per G.703 and STS-3 ........................................................... 43 26 Jitter Tolerance ................................................................................................... 44 27 Generation Measurement Filter Characteristics................................................. 45 28 Typical Coax Jitter Transfer ................................................................................ 46 29 Typical Fiber Jitter Transfer ............................................................................... 47 30 LXT6155LE Package Specification ..................................................................... 48 4 ................................................................................................ 26 ......................................................................................... 33 .................................................................................................. 37 ................................................................................... 48 Datasheet ...
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Revision History Datasheet 155 Mbps SDH/SONET/ATM Transceiver — LXT6155 5 ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver 6 Datasheet ...
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Figure 1. LXT6155 Block Diagram m P Control (CS, SCLK, SDI, SDO), Hardware (MODE0, SP, CIS, RIFE) TTIP1 TRING1 TTIP0 TRING0 Local Loopback RTIP Adaptive Equalizer RRING RXISH Datasheet 155 Mbps SDH/SONET/ATM Transceiver — LXT6155 Optional RLIS, 19.4MHz crystal LLIS ...
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... TAVCC TDVCC 6 TSICLKP 7 TSICLKN 8 TPOS 9 10 TNEG 11 TDGND 12 CS/MODE SCLK/SP 13 SDI/CIS 14 SDO/RIFE 15 16 TPID7 LXT6155LE 40 (top view VBIAS ATST RAVCC LOS LOCK ROFP/CMIERR RDGND RDVCC RPOS RNEG PVCC RSOCLKN RSOCLKP GND RPOD0 RPOD1 Datasheet ...
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Table 1. LXT6155 Pin Descriptions 1 Pin # Symbol I/O 1 XTALIN AI/O 2 XTALOUT 3 TAGND S 4 TXISH AI/O 5 TAVCC S 6 TDVCC S 7 TSICLKP DI 8 TSICLKN 9 TPOS DI 10 TNEG 11 TDGND S ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Table 1. LXT6155 Pin Descriptions (Continued) 1 Pin # Symbol I/O 16 TPID7/TXTRIM3 DI 17 TPID6/TXTRIM2 18 TPID5/TXTRIM1 19 TPID4/TXTRIM0 20 TPID3/TXTRIMENA DI 21 TPID2 DI 22 TPID1 23 TPID0 24 TPICLK DI 25 ...
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Table 1. LXT6155 Pin Descriptions (Continued) 1 Pin # Symbol I/O 43 ROFP/ DO CMIERR 44 LOCK DO 45 LOS DO 46 RAVCC S 47 ATST - 48 VBIAS AI 49 RXISH A0 50 RAGND S 51 RRING AI 52 ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Table 1. LXT6155 Pin Descriptions (Continued) 1 Pin # Symbol I/O 62 TRING1 DO 63 TTIP1 64 TVCC Digital Input Digital Output; DI/O = Digital Input/Output ...
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Functional Description The LXT6155 is a front-end transceiver designed for 155 Mbps OC3/STM1/ATM transmission applications. Table 2 lists the standards with which the LXT6155 is compliant. The LXT6155 interfaces to either a fiber transceiver or a coax cable on ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Figure 2. LXT6155 System Interface Line Interface Fiber Optic Modules or Coax Transformers 2.1.2.1 CMI Encoding Coded Mark Inversion (CMI encoding scheme adopted by SONET STS-3 and SDH STM1 standards. CMI encoding ...
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The receive PLL requires an external reference (e.g. transmit input clock or XTAL clock) to start up the clock recovery process. This clock can ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver frames with incorrect frame words are required. Byte alignment occurs when entering the in-frame state. In case of an OOF event, the byte alignment and frame pulse position are frozen. The ROFP output continues ...
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Figure 5. Receive Frame Synchronization and Frame Pulse Position RPOCLK RPOD <7:0> Hex Contents of REG 13h Binary 1111 1110 Table 2. Standards Compliance Item Line Rate (Mbps) Line Interface Line Code Signal Templates Jitter Figure ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver 2.3 Clocks 2.3.1 Parallel Mode The LXT6155 accepts TPICLK synchronized with transmit input parallel data TPID<7:0>. The data is serialized and transmitted at TTIP0/TRING0 or TTIP1/TRING1 depending on which line encoding mode is selected. ...
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Rx PLL loss of lock (LOCK=Low) conditions RSOCLK P/N is switched to the Tx serial clock. Also the serial output data is forced to all zeros. This feature can be disabled in SW mode (HWSEL = High) via ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver 2.5.1 Hardware Mode By setting HWSEL = Low, the LXT6155 operates in standalone hardware mode, without a serial microprocessor interface. A subset of the functions available in the Software Mode can be set in ...
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Loopback Test (RLIS and LLIS pins) The LXT6155 allows two types of loopback test: Remote loopback and Local loopback. In Remote loopback, the received data and clock are looped back to the transmit line interface. The LXT6155 still outputs ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver 2.5.2 Software Mode When HWSEL = High, the LXT6155 operates in Software Mode. Control is through an external serial P interface. Figure 8 shows the pins used in Software Mode. The LXT6155 uses four ...
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Figure 8. Software Mode ADDR0, ADDR1 Figure 9. Serial Data Output Word Structure (Read Cycle: R/W=High) CS DON'T SCLK CARE DON'T R/W A6 SDI CARE =1 SDO High Impedance Figure 10. Serial Data Input Word Structure (Write Cycle: R/W = ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Figure 11. Serial Interface Nevada TPOS, TNEG RPOS, RNEG CMIERR, LOS Figure 12. Parallel Interface Nevada RPOD<0:7> RPOCLK LOS, ROFP/ CMIERR 2.8 Loopback Modes The LXT6155 provides two loopback modes that can be executed ...
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Remote Loopback Remote loopback routes the receive system output signals, both data and clock, to the transmit system input (see Figure 14). In this mode, system outputs (RPOD<7:0> or RPOS/RNEG) are still active. Figure 13. Local Loopback TTIP0, TRING0, ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver 3.0 Register Definitions There are a total of sixteen (16) control registers in the LXT6155 addressed by the lowest four address bits, A<3:0>. See Tables 8 through 22 for details . Table 6. Device ...
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Table 8. Primary Control Register Settings, Register #0 (Address A<3:0>=0000) Bit Default Mnemonic 7 0 lpbk_cntl pll_ref clk_inv sys_int 0 0 media_sel . Table 9. Tx Control, ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver . Table 10. Transmit PLL1, Register #2 (Address A<3:0>=0010) Bit Default Mnemonic 7:5 0.1.1 4:3 0.0 2:1 1 Table 11. Transmit PLL2, Register #3 (Address A<3:0>=0011) Bit Default Mnemonic 7 1 ...
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Table 13. Equalizer & AGC, Register #5 (Address A<3:0>=0101) (Continued) Bit Default Mnemonic 3:2 0.0 agc_adapt_gain 1 1 afe_ena 0 0 Table 14. Matching Filter 2, Register #6 (Address A<3:0>=0110) Bit Default Mnemonic 7:5 0.1.0 4:3 1.0 2:1 0.0 0 ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Table 17. Rx PLL 2, Register #9 (Address A<3:0>=1001) Bit Default Mnemonic 5:3 0.1.1 freq_det_pw Table 18. Test, Register #10 (Address A<3:0>=1010) Bit Default ...
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Table 20. Rx Digital 1, Register #12 (Address A<3:0>=1100) (Continued) Bit Default Mnemonic 5:4 1.1 los_ena 3 0 frame_ena Figure 15. Rx Digital 2, Register #13 (Address A<3:0>=11001) Bit Default Mnemonic 7 1 ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Table 22. Read-only Register #15 (Address A<3:0>=1111) Value of: stat_cont bit 7 bit 6 00 Analog LOS Digital LOS (Status register) 01 Not for customer use 02 Not for customer use 03 (Fuse contents- ...
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Application Information The following provides application examples of interfacing the LXT6155 to the line side and the overhead terminator side. Line side encoding schemes can be one of two types: LVPECL NRZ encoded for a fiber optic module, or ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Figure 16. 3.3 V LVPECL to 3.3 V LVPECL Interface 49 RXISH 330 nF 48 VBIAS 15k TXISH 68nF 47 NC ATST LXT6155 LXT6155 1) R1,R2,R5,R6 = 127 Ohms R3,R4,R7,R8 ...
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Figure 17. 75 Coax Cable Interface 49 RXISH 330 nF 48 VBIAS 15k TXISH 68nF 47 NC ATST LXT6155 LXT6155 Table 23. Transformer Specifications Parameter -3dB Low Transmission, S12 -3dB High -20dB Low Return Loss, S11 -20dB High ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Table 24. Crystal Specifications Parameter Center frequency Freq tolerance Temperature drift Aging Mode Shunt capacitance Equivalent resistance Temperature Range 36 Min Typ Max Unit 19.44 MHz -20 20 ppm -20 20 ppm -10 10 ...
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Test Specifications Information in Table 25 through 34 and Figures 18 through 28 represent the performance specifications of the LXT6155 and are guaranteed by test, except as noted by design. Table 25. Absolute Maximum Ratings Parameter DC supply (reference ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Table 28. Transmit Timing Characteristics (See Figures 18 and 19) Parameter Transmit serial input clock frequency Transmit serial input clock frequency error Transmit serial input clock duty cycle Transmit serial input clock and data ...
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Table 29. Transmit Analog Characteristics Parameters 2 Transmit jitter generation 12 kHz - 1.3 MHz (Intrinsic jitter SONET spec) 2 Transmit jitter generation 500 Hz - 1.3 MHz (Intrinsic jitter SDH spec) 65 kHz - 1.3 MHz Transmit jitter transfer ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Table 30. Receive Timing Characteristics (See Figures 20 and 21) (Continued) Parameter Reference Clock Offset from Nominal 1. Typical values are at 25C and 3.3V. They are for design aid only; not guaranteed and ...
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Table 31. Receive Analog Characteristics (Continued) Parameter LOS Thresholds - Coax LOS hysteresis - coax 2 12 kHz - 1.3 MHz Receive jitter generation (intrinsic jitter SONET spec) 2 500 Hz - 1.3 MHz Receive jitter generation (intrinsic jitter SDH ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Parameter SCLK falling edge to SDO high Z CS rising edge to SDO high Z 1. Typical values are at 25C and 3.3V. They are for design aid only; not guaranteed and not subject ...
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Figure 24. CMI Encoded Zero per G.703 and STS-3 V 0.60 (Note 1) 0.55 0.50 0.45 0.40 Nominal 0.05 zero level –0.05 (Note 2) –0.40 –0.45 –0.50 –0.55 –0.60 Figure 25. CMI Encoded One per G.703 and STS-3 V 0.60 ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Note: The maximum “steady state” amplitude should not exceed the 0.55 V limit. Overshoots and other transients are permitted to fall into the dotted area. Note: With the signal applied, the vertical position of ...
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Table 33. Jitter Generation Signal Table 34. Jitter Transfer Figure 27. Generation Measurement Filter Characteristics 0 dB Datasheet 155 Mbps SDH/SONET/ATM Transceiver — LXT6155 f1 f2 OC3 12 kHz 1.3 MHz STM1 500 Hz 1.3 MHz 65 kHz 1.3 MHz ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver Figure 28. Typical Coax Jitter Transfer -10 -20 -30 - Note: Measured with the device in remote loopback. Data reflects total jitter in both Tx and Rx path ...
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Figure 29. Typical Fiber Jitter Transfer -10 -20 -30 - Note: Measured with the device in remote loopback. Data reflects total jitter in both Tx and Rx path Datasheet 155 Mbps SDH/SONET/ATM Transceiver — ...
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... LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver 6.0 Mechanical Specifications Figure 30. LXT6155LE Package Specification 64-pin Low-profile Quad Flat Pack — Part Number LXT6155LE — Extended Temperature Range: -40° °C Dim BSC—Basic Spacing between Centers ...
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Notes Datasheet 155 Mbps SDH/SONET/ATM Transceiver — LXT6155 49 ...
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LXT6155 — 155 Mbps SDH/SONET/ATM Transceiver 50 Datasheet ...